CSR Integrates Bluetooth with Stereo Audio Processor for Mobile Phones

(Product News, 27 Mar 2008)

CSR has launched MusiCore1, a fully featured single-chip stereo audio processor+Bluetooth for mobile phones, which feature state of the art audio enhancement technologies for MP3 audio and superior voice clarity.

Available in a compact 3.8x4.8mm CSP or BGA packages, CSR's MusiCore1 overcomes the limitations of a phone CPU to handle both audio and voice processing, significantly reducing the higher bill of materials (BoM) and design restrictions of using both Bluetooth and audio processor chips. It supports decoding of all mainstream music file formats including MP3, AAC, AAC+, WMA and SBC. The efficiency of CSR's mature DSP architecture means processing audio files is effortless: 5.25mW for an MP3 file, compared to the 80mW consumed by a phone's CPU for the same decoding. This efficiency contributes to MusiCore1's ability to provide a phone with 100 hours of music playback. The CPU can remain asleep when MusiCore1 is handling music files.

Based on CSR's own Kalimba 64MIPS Digital Signal Processor (DSP), which provides high-quality stereo Bluetooth voice and music inside CSR's BlueCore Multimedia product range, MusiCore1 offers audio quality comparable to standalone MP3 players—with 95dB signal-to-noise-ratio (SNR). CSR's latest CVC noise reduction technology also provides 30dB of dynamic background noise reduction - sufficient noise suppression to ensure voice remains clearly audible at a rock concert or airport for example.

Feature phone or high-end music phone designers can use MusiCore1 to embed both high quality stereo audio, plus low latency Bluetooth, with power, cost and PCB-space savings plus voice enhancement features. At the same time, designers of ultra low cost phones now have the option to differentiate handsets by embedding Bluetooth and audio processing without sacrificing cost, features or quality.

The Bluetooth element of MusiCore1 includes CSR's BlueCore technology including support for v2.1 + EDR Bluetooth, and CSR's FastStream low latency (40ms) Bluetooth technology that ensures there are no lip synch/time delay issues when a phone is used for gaming or watching videos and is connected to Bluetooth headphones.

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